TWI776043B - elastic track - Google Patents

Abstract

The present invention provides an elastic crawler belt with improved durability while suppressing an increase in mass. The elastic crawler belt 1 of the present invention includes an endless belt-shaped crawler belt body 2, a core material 3 made of a hard material, and blocks 4 protruding in the crawler belt thickness direction c. The core material 3 includes a first core material 10 , and a second core material 11 having one end 11e on the side of the first edge 2x rather than the one end 10e of the first core material 10 . The block 4 includes a first block 20 that overlaps one end 10e of the first core material 10 and one end 11e of the second core material 11 . The outer edge 4e of the block 4 is inclined with respect to the crawler width direction b from the one end 10e side of the first core material 10 toward the one end 11e side of the second core material 11 .

Description

elastic track

The present invention relates to an endless belt-shaped elastic crawler.

Heretofore, there has been known a rubber crawler including a ring-shaped rubber elastic body, a plurality of core rods arranged in the rubber elastic body, and rugs partially formed on the outer peripheral surface of the rubber elastic body. Such a rubber crawler is used, for example, as a running part of a construction machine, an agricultural machine, or the like for running on an unpaved road such as a rubble or a gravel road. Therefore, such a rubber crawler has the following problems when, for example, climbing a protrusion on an unpaved road surface: the rigidity level difference between the part with the core rod and the part without the core rod becomes large, and the strain is concentrated between the parts , on the outer peripheral surface of the rubber elastic body in which the core rod is provided and the blocks are not arranged, cracks or nicks, etc., which are called "cracks", are likely to be generated. Therefore, in order to solve such a problem, it has been proposed to strengthen the outer peripheral surface by increasing the volume of the blocks and covering most of the outer peripheral surface with the blocks. A related technology is described in Patent Document 1 below. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2009-292204

[Problems to be Solved by Invention]

However, if only the volume of the block is increased, there is a problem that the mass of the rubber crawler increases.

The present invention has been made in view of the above-mentioned actual conditions, and its main object is to provide an elastic crawler belt which suppresses an increase in the mass of the elastic crawler belt, suppresses edge cracking, and improves the durability performance. [Technical means to solve the problem]

The present invention is an elastic crawler, comprising: an annular belt-shaped crawler body including an elastic body; a core material, which is embedded in the crawler body at intervals in the circumferential direction of the crawler, and includes a material harder than the elastic body; and a block, protruding from the outer peripheral surface of the crawler body toward the thickness direction of the crawler, and the crawler body has a first edge and a second edge in the width direction of the crawler, and the core material includes: a first core The first edge side has one end; and the second core material is adjacent to the first core material in the crawler belt circumferential direction and has one end on the first edge side rather than the one end of the first core material and the blocks include a first block, which overlaps across the one end of the first core material and the one end of the second core material when the crawler body is viewed in plan view and the first block includes an inclined edge, and the inclined edge is an outer edge of the block relative to the crawler belt from the one end side of the first core material toward the one end side of the second core material The width direction is inclined.

In the elastic crawler belt of the present invention, preferably, in the core material, the first core material and the second core material are alternately arranged in the crawler belt circumferential direction.

In the elastic crawler according to the present invention, it is preferable that the second core material has the other end on the second edge side, and the first core material has the other end located closer to the second core material than the other end of the second core material. At the other end of the second edge side, the block includes a second block, and the second block spans the other end of the first core material and the first block when the crawler body is viewed in plan. The other ends of the two core materials are overlapped, and the second block includes an inclined edge in which the outer edge of the block faces from the other end side of the second core material to the first block. The other end side of one core material is inclined with respect to the width direction of the crawler belt.

In the elastic crawler belt of the present invention, it is preferable that the first block and the second block are arranged in a zigzag shape in the crawler belt circumferential direction.

In the elastic crawler of the present invention, it is desirable that the blocks include: a widthwise portion extending in the widthwise direction of the crawler; and an inclined portion connected to an outer end of the widthwise portion in the widthwise direction of the crawler and facing the crawler. The width direction is inclined towards one side.

In the elastic crawler according to the present invention, it is preferable that the crawler main body has a hole portion penetrating in the crawler belt thickness direction at the center of the crawler main body in the crawler belt width direction, and the first core material of the core material and the The second core material has a blade portion, the blade portion is provided on both outer sides in the width direction of the crawler track than the hole portion, and the block is connected to all the first cores when the crawler track body is viewed in plan view. The blade portion of the material and the blade portion of the second core material overlap.

In the elastic crawler belt of the present invention, it is desirable that the blocks are connected to the holes.

In the elastic crawler according to the present invention, it is preferable to include a tensile body, which is buried on the outer peripheral side of the crawler rather than the core material, and which imparts a tensile force to the crawler body, and the blade portion includes a first blade portion, which is arranged on either side in the width direction of the crawler; and a second blade portion disposed on the opposite side of the first blade portion in the width direction of the crawler, and the length of the second blade portion in the width direction of the crawler It is larger than the first blade portion, and the first blade portion is arranged so as to face the tensile body and is arranged so as not to receive the tensile force from the tensile body substantially so as to have a crawler thickness between the first blade portion and the tensile body The distance L1 in the direction, the second blade portion is arranged so as to face the tensile body and is arranged to receive the tensile force from the tensile body, and there is a distance L2 in the direction of the crawler thickness between the tensile body and the tensile body , the distance L1 is greater than the distance L2. [Effect of invention]

In the elastic crawler belt of the present invention, the core material includes: a first core material having one end on a first edge side; and a second core material adjacent to the first core material in the crawler belt circumferential direction, and further away from the first core material than the first core material. The one end of the core material has one end closer to the first edge side. Thereby, the one end of the first core material and the one end of the second core material are easily covered by the blocks. In addition, the first core material helps to reduce the mass of the elastic crawler.

In addition, when the crawler main body is viewed in plan view, the blocks overlap one end of the first core material and one end of the second core material. As a result, one end of the first core material and one end of the second core material to which large strain acts are covered by the blocks, so that the occurrence of cracks in the crawler body is suppressed. Further, the outer edge of the block includes an inclined edge inclined from the one end side of the first core material to the one end side of the second core material. Thereby, an increase in the volume of the blocks can be suppressed.

Therefore, the elastic crawler of the present invention improves durability while suppressing an increase in the mass of the elastic crawler.

Hereinafter, an embodiment of the present invention will be described in detail based on the drawings. FIG. 1 is a plan view of the elastic crawler belt 1 of the present embodiment viewed from the crawler belt outer peripheral side co (shown in FIG. 2 ). FIG. 2 is a cross-sectional view of the elastic crawler 1 of FIG. 1 in the crawler width direction b. The elastic crawler 1 of the present invention can be used, for example, as a running part of a construction machine such as a backhoe. The elastic crawler 1 is wound around, for example, the outer periphery of a traveling device (not shown) including a drive wheel (not shown) arranged at a predetermined position, an idler, and a drive wheel and an idler. Multiple rollers between idlers.

As shown in FIGS. 1 and 2 , the elastic crawler 1 of the present embodiment includes: a crawler body 2 including an elastic body; a plurality of core materials 3 embedded in the crawler body 2 ; and a plurality of blocks 4 extending from the crawler body 2 It protrudes in the direction c of the thickness of the crawler. The elastic crawler 1 of the present embodiment further includes a tensile body 6 which is embedded in the crawler body 2 on the outer peripheral side co of the crawler rather than the core material 3 , and which imparts a tensile force to the crawler body 2 . In FIG. 1 , the blocks 4 are specified by hatches for convenience of explanation.

In this specification, the crawler belt circumferential direction a is the rotation direction of the elastic crawler belt 1 . In addition, the crawler belt width direction b is the axial direction of the drive wheel when the elastic crawler belt 1 is attached to the traveling part. Furthermore, the crawler belt thickness direction c is a direction orthogonal to the crawler belt circumferential direction a and the crawler belt width direction b. In the crawler belt thickness direction c, the side facing the road surface of the elastic crawler belt 1 is the crawler belt outer peripheral side co. In addition, in the crawler belt thickness direction c, the side opposite to the crawler belt outer peripheral side co is the crawler belt inner peripheral side ci.

In the present embodiment, the crawler body 2 has a first edge 2x and a second edge 2y in the crawler width direction b. The first edge 2x of the present embodiment forms the left end of the crawler body 2 in FIG. 1, and extends linearly along the crawler circumferential direction a. The second edge 2y of the present embodiment forms the right end of the crawler body 2 in FIG. 1 and extends linearly along the crawler circumferential direction a. In addition, the first edge 2x and the second edge 2y are not limited to extending linearly.

The crawler body 2 includes, for example, hard rubber or resin, and is continuously formed in an endless belt shape. The crawler main body 2 of the present embodiment has a substantially constant width in the crawler width direction b. In the present embodiment, the crawler main body 2 has an outer peripheral surface 2o on the crawler outer peripheral side co, and an inner peripheral surface 2i on the crawler inner peripheral side ci. A plurality of protrusions 7 protruding toward the inner peripheral side ci of the crawler belt are formed on the inner peripheral surface 2i of the present embodiment. The plurality of projections 7 are arranged, for example, at approximately equal intervals in the crawler belt circumferential direction a (not shown).

In the present embodiment, the outer peripheral surface 2o of the crawler body 2 includes: a first surface part 2A arranged at a position facing the tensile body 6; and a second surface part 2B connected to the first edge 2x or the second edge 2y. In the present embodiment, the first surface portion 2A is provided on both sides with the center 2c of the crawler body 2 therebetween. The first surface portion 2A extends, for example, along the crawler width direction b, and is formed substantially parallel to the tensile body 6 . In the present embodiment, the second surface portion 2B is continuous with the first surface portion 2A, and is formed in a convex arc shape on the outer peripheral side co of the crawler belt. Such a second surface portion 2B maintains the rigidity of the elastic body 2 high.

In the present embodiment, the outer peripheral surface 2o includes a third surface portion 2C disposed between the first surface portions 2A. The third surface portion 2C of the present embodiment is located closer to the crawler belt outer peripheral side co than the first surface portion 2A. In addition, the outer peripheral surface 2o is not limited to this form, and may be formed only by the 1st surface part 2A and the 2nd surface part 2B.

The core materials 3 are each formed of a material harder than the elastic body constituting the crawler body 2 . The core material 3 is formed of, for example, a metal material such as steel and cast iron, or a hard resin. Such core material 3 can reinforce the crawler body 2 and maintain the shape of the crawler body 2 .

In the present embodiment, the core material 3 is formed such that the length L in the crawler belt width direction b is greater than the width W in the crawler belt circumferential direction a when the crawler belt body 2 is viewed in plan (hereafter, it may only be referred to as “plan view”). Roughly rectangular shape. In addition, the core material 3 is not limited to this form.

The core material 3 includes a first core material 10 and a second core material 11 adjacent to each other in the circumferential direction a of the crawler belt. In the present embodiment, the first core material 10 and the second core material 11 are alternately arranged in the crawler belt circumferential direction a.

The first core material 10 and the second core material 11 of the present embodiment extend in the crawler belt width direction b, and include one end 10e and one end 11e on the first edge 2x side with respect to the center 2c of the crawler belt body 2, The center 2c of the body 2 is closer to the other end 10i and the other end 11i on the side of the second edge 2y.

The other end 10i of the first core material 10 is arranged on the second edge 2y side rather than the other end 11i of the second core material 11 . One end 11e of the second core material 11 is arranged on the side of the first edge 2x rather than the one end 10e of the first core material 10 . Thereby, the mass increase of the core material 3 is suppressed.

Since the first core material 10 and the second core material 11 are alternately arranged in the crawler belt circumferential direction a, the mass balance in the crawler belt width direction b of the elastic crawler belt 1 is maintained.

FIG. 3 is a plan view of the elastic crawler belt 1 viewed from the crawler belt outer peripheral side co. As shown in FIG. 3 , the block 4 of the present embodiment includes a tread surface 4A that is disposed closest to the outer peripheral side co of the crawler belt and in contact with the road surface, and a connecting surface 4B that connects the tread surface 4A to the outer peripheral surface 2o of the crawler body 2 . The boundary between the connection surface 4B and the outer peripheral surface 2o is the outer edge 4e.

The blocks 4 include: a first block 20 that overlaps one end 10e of the first core material 10 and one end 11e of the second core material 11 in a plan view; and a second block 21 that spans the first core in a plan view The other end 10i of the material 10 and the other end 11i of the second core material 11 are overlapped. The first block 20 and the second block 21 cover the one end 10e and the other end 10i of the first core material 10 and the one end 11e and the other end 11i of the second core material 11 , which are subject to large strain, and thus effectively suppress the The occurrence of cracked edges of the crawler body 2 .

In the present embodiment, the tread surface 4A of the block 4 includes a widthwise surface 22A extending along the crawler width direction b, and an inclined surface 22B connected to the outer end of the widthwise surface 22A in the crawler width direction b and opposite to the widthwise surface 22A. The track width direction b is inclined to one side. The width direction surface 22A of this embodiment is formed to include a rectangular shape having the same length w in the crawler belt circumferential direction a. The inclined surface 22B of the present embodiment is formed in a conical shape in which the length w in the crawler belt circumferential direction a gradually decreases toward the outer side in the crawler belt width direction b. Such inclined surface 22B reduces the mass of the elastic crawler 1 .

In the present embodiment, the outer edge 4e of the block 4 extends along the edge 4i of the tread surface 4A. Such an outer edge 4e maintains the rigidity of the block 4 high.

FIG. 4 is a plan view of the elastic crawler belt 1 viewed from the crawler belt outer peripheral side co. As shown in FIG. 4 , in the present embodiment, the outer edges 4e of the first block 20 and the second block 21 respectively include a first inclined edge 25 , a first width direction edge 26 , a second inclined edge 27 , and The second width direction edge 28 .

The first inclined edge 25 of the first block 20 is inclined with respect to the crawler width direction b from the one end 10e side of the first core material 10 toward the one end 11e side of the second core material 11 . The first inclined edge 25 inclined as described above suppresses an increase in the volume of the blocks 4 and reduces the mass of the elastic crawler 1 compared to the case of extending in the crawler width direction b, for example. In the present embodiment, the first inclined edge 25 of the first block 20 extends linearly from the one end 10e of the first core material 10 to the outer side in the crawler width direction b beyond the one end 11e of the second core material 11 without contacting the end 11e of the second core material 11 One end 11e of the second core material 11 crosses. Thereby, the high crack edge suppression effect is exhibited. The first inclined edge 25 of the first block 20 is connected, for example, to the first edge 2x. Also, the first inclined edge 25 may terminate on the outer peripheral surface 2o without being connected to the first edge 2x.

The first width direction edge 26 of the first block 20 of the present embodiment is continuous with the inner end 25i in the crawler width direction b of the first inclined edge 25, and extends linearly toward the inner side in the crawler width direction b. In the present embodiment, the first width direction edge 26 extends along the crawler belt width direction b on the outer edge 10 x of the first core material 10 . In addition, the 1st width direction edge 26 is not limited to this form.

The second inclined edge 27 of the first block 20 of the present embodiment extends linearly from the outer side toward the inner side in the crawler width direction b compared to the one end 11e of the second core material 11 . In the present embodiment, the second inclined edge 27 is inclined in the same direction as the first inclined edge 25 in plan view, and overlaps and terminates on the outer edge 11x of the second core material 11 . The second inclined edge 27 of the first block 20 extends, for example, from the first edge 2x toward the inner side in the crawler width direction b without being in contact with the one end 11e of the second core material 11 . Such a second inclined edge 27 can also exert a high edge crack suppressing effect. In addition, the second inclined edge 27 is not limited to this form.

The second width direction edge 28 of the first block 20 of the present embodiment is continuous with the second inclined edge 27 and extends linearly toward the inner side in the crawler width direction b. In the present embodiment, the second width direction edge 28 overlaps with the outer edge 11x of the second core material 11 and extends along the crawler belt width direction b in plan view. The second width direction edge 28 is not limited to this form.

The first inclined edge 25 of the second block 21 is inclined with respect to the crawler width direction b from the other end 11i side of the second core material 11 toward the other end 10i side of the first core material 10 . The first inclined edge 25 inclined as described above can suppress an increase in the volume of the second block 21 and reduce the mass of the elastic crawler 1 compared to the case of extending in the crawler width direction b, for example. In the present embodiment, the first inclined edge 25 of the second block 21 extends linearly from the other end 11i of the second core material 11 to the outside in the crawler width direction b beyond the other end 10i of the first core material 10 without It intersects with the other end 10i of the first core material 10 . The first inclined edge 25 of the second block 21 ends, for example, at the second edge 2y. Also, the first inclined edge 25 may terminate on the outer peripheral surface 2o without communicating with the second edge 2y.

The first width direction edge 26 of the second block 21 of the present embodiment is continuous with the inner end 25i in the crawler width direction b of the first inclined edge 25, and extends linearly toward the inner side in the crawler width direction b. In the present embodiment, the first width direction edge 26 extends along the crawler belt width direction b on the outer edge 11 x of the second core material 11 .

The second inclined edge 27 of the second block 21 of the present embodiment extends linearly from the outer side toward the inner side in the crawler width direction b compared to the other end 10i of the first core material 10 . The second inclined edge 27 is inclined in the same direction as the first inclined edge 25 of the second block 21 in plan view, and overlaps and terminates on the outer edge 10x of the first core material 10 . The second inclined edge 27 of the second block 21 is connected, for example, to the second edge 2y.

The second width direction edge 28 of the second block 21 of the present embodiment is continuous with the second inclined edge 27 of the second block 21 and extends linearly toward the inner side in the crawler width direction b. In the present embodiment, the second width direction edge 28 of the second block 21 overlaps with the outer edge 10x of the first core material 10 and extends in the crawler belt width direction b in plan view. As a result, the second block 21 also overlaps the core material 3 in a plan view, and thus exhibits a high crack suppression effect. In addition, the second block 21 suppresses an excessive increase in the mass of the elastic crawler 1 .

In this way, in the present embodiment, the blocks 4 overlap with all the blade portions 14 of the first core material 10 and the blade portions 14 of the second core material 11 in plan view.

In addition, in the present embodiment, each of the first width direction edge 26 and the second width direction edge 28 overlaps with the outer edge 10x of the first core material 10 or the outer edge 11x of the second core material 11, respectively. Thereby, an excessive increase in the mass of the elastic crawler belt 1 is suppressed.

The first blocks 20 of the present embodiment are provided at constant intervals in the circumferential direction a of the crawler belt. The second blocks 21 of the present embodiment are provided at constant intervals in the circumferential direction a of the crawler belt. Thereby, the mass balance in the crawler width direction b of the elastic crawler 1 is highly maintained.

The first blocks 20 and the second blocks 21 are arranged, for example, in a zigzag shape in the crawler belt circumferential direction a. In the present embodiment, the first blocks 20 and the second blocks 21 are shifted by a half pitch in the circumferential direction a of the crawler belt. As a result, in the crawler belt circumferential direction a, since the rigidity step in the crawler belt width direction b of the blocks 4 is reduced, edge cracking is suppressed and durability is improved.

In the present embodiment, the crawler body 2 has a plurality of holes 8 penetrating in the crawler thickness direction c at the center of the crawler body 2 in the crawler width direction b. The elastic crawler belt 1 rotates by inserting the teeth of a driving wheel such as a sprocket in the hole portion 8 to transmit a driving force. The holes 8 are provided between the first core material 10 and the second core material 11 at substantially equal intervals in the crawler belt circumferential direction a. In the present embodiment, the hole portion 8 is opened in the third surface portion 2C (shown in FIG. 2 ).

Between the holes 8 adjacent in the crawler belt circumferential direction a, there are provided protrusions 9 that protrude from the outer peripheral surface 2o toward the crawler belt outer peripheral side co. In the present embodiment, the protrusions 9 are arranged so as to cover the core material 3, and are provided at intervals in the crawler belt circumferential direction a. In other words, the protrusion 9 overlaps with the first core material 10 and the second core material 11 in a plan view. In the present embodiment, the protruding portion 9 and the hole portion 8 are connected to the tread surface 4A via the connecting surface 4B of the block 4 .

As shown in FIG. 2 , in the present embodiment, the tensile body 6 is configured such that a plurality of metal cords 6a extending in the crawler belt circumferential direction a are aligned in the crawler belt width direction b with a predetermined gap.

The tensile bodies 6 are arranged on both sides of the center 2 c of the crawler body 2 in the crawler width direction b. In the present embodiment, the tensile body 6 includes a first tensile body 6A on the side of the first edge 2x and a second tensile body 6B on the side of the second edge 2y. In the present embodiment, the first tensile body 6A and the second tensile body 6B are provided at substantially line-symmetrical positions with respect to the center 2c in the crawler belt width direction b of the crawler belt body 2 .

The core material 3 includes, for example: a core material base 13 arranged at the center 2c of the crawler body 2 and the drive wheel is engaged with it; a blade part 14 arranged on the outer side in the width direction b of the crawler rather than the core material base 13; and a pair of corners 15, which is connected to the core material base 13 and protrudes toward the inner peripheral side ci of the crawler belt. In the present embodiment, the corners 15 are covered with the protrusions 7 .

In the present embodiment, the blade portion 14 includes a first blade portion 14A and a second blade portion 14B whose length in the crawler width direction b is larger than that of the first blade portion 14A. The first blade portion 14A is arranged on either side in the crawler width direction b from the center 2 c of the crawler body 2 , and the second blade portion 14B is arranged on the opposite side in the crawler width direction b from the first blade portion 14A .

FIG.5(a) is the figure which looked at the 1st core material 10 from the crawler belt circumferential direction a. FIG.5(b) is the figure which looked at the 2nd core material 11 from the crawler belt circumferential direction a. As shown in FIGS. 5( a ) and 5 ( b ), in the present embodiment, the first core material 10 and the second core material 11 have the first blade portion 14A and the second blade portion 14B, respectively.

The first blade portion 14A of the first core material 10 includes one end 10e of the first core material 10 in the present embodiment. The second blade portion 14B of the first core material 10 includes the other end 10i of the first core material 10 in this embodiment. The first blade portion 14A of the second core material 11 includes the other end 11i of the second core material 11 in the present embodiment. The second blade portion 14B of the second core material 11 includes one end 11e of the second core material 11 in the present embodiment.

In the present embodiment, the first blade portion 14A is arranged to face the tensile body 6 and is arranged away from the tensile body 6 so as not to receive a tensile force from the tensile body 6 substantially. The first blade portion 14A of the first core material 10 is arranged to face the first tensile body 6A. The first blade portion 14A of the second core material 11 is arranged to face the second tensile body 6B.

In the present embodiment, the second blade portion 14B is arranged so as to face the tensile body 6 and to receive the tensile force from the tensile body 6 , and is arranged close to the tensile body 6 . The second blade portion 14B of the first core material 10 is arranged to face the second tensile body 6B. The second blade portion 14B of the second core material 11 is arranged to face the first tensile body 6A.

The first blocks 20 are stacked on all the first blade portions 14A of the first core material 10 and the second blade portions 14B of the second core material 11 in plan view. In addition, the second blocks 21 are stacked on all the second blade portions 14B of the first core material 10 and the first blade portions 14A of the second core material 11 . Thereby, the occurrence of cracks in the crawler body 2 is more effectively suppressed (shown in FIG. 4 ).

In the present embodiment, the core material 3 includes: an outer top surface 17 facing the tensile body 6 and extending in the crawler width direction b; ci, and extends in the width direction b of the track.

The outer top surface 17 of the present embodiment includes: a first outer top surface 17a, which forms the first blade portion 14A and is arranged on the outermost peripheral side co of the crawler belt; and a second outer top surface 17b, which forms the second blade portion 14B and is arranged in Closest to the outer peripheral side of the crawler.

In the present embodiment, the first outer top surface 17a is located closer to the crawler belt inner peripheral side ci than the second outer top surface 17b. In other words, in the present embodiment, the distance L1 in the crawler thickness direction c between the first blade portion 14A and the tensile body 6 is larger than the distance L1 in the crawler thickness direction c between the second blade portion 14B and the tensile body 6 The distance L2. Thereby, the mass of the first blade portion 14A can be further reduced. In addition, for example, when a foreign matter bites between the teeth of the sprocket and the hole portion 8, a force for rotating the second blade portion 14B toward the inner peripheral side ci of the crawler belt acts. Thereby, the first blade portion 14A can be retracted (rotated) to the side of the first tensile body 6A without applying a large tensile force to the tensile body 6 , and in FIG. 5( a ), it is the first tensile body 6A . Therefore, the damage to the first tensile body 6A or the first blade portion 14A of the first core material 10 due to the tensile force is suppressed, and the durability performance is improved.

The inner top surface 18 of the present embodiment includes a first inner top surface 18a that forms the first blade portion 14A and is disposed closest to the inner peripheral side ci of the crawler belt, and a second inner top surface 18b that forms the second blade portion 14B and is disposed On the side closest to the inner circumference of the crawler ci. In the present embodiment, the first inner top surface 18a and the second inner top surface 18b extend substantially linearly along the crawler belt width direction b. In this embodiment, the 1st inner side top surface 18a and the 2nd inner side top surface 18b are arrange|positioned at the position which is the same height in the crawler belt thickness direction c. In addition, the 1st inner side top surface 18a and the 2nd inner side top surface 18b are not limited to this form.

As mentioned above, although the especially preferable embodiment of this invention was described in detail, this invention is not limited to the said embodiment, It can deform|transform and implement in various forms.

1‧‧‧Elastic Track 2‧‧‧Crawler body 2A‧‧‧First face 2B‧‧‧Second face 2C‧‧‧Third face 2c‧‧‧Center 2x‧‧‧First edge 2y‧‧‧Second Edge 2o‧‧‧Outer peripheral surface of track body 2i‧‧‧Inner peripheral surface of track body 3‧‧‧Core material 4‧‧‧Pattern block 4A‧‧‧Tread 4B‧‧‧Connection surface 4e‧‧‧Outer edge 4i‧‧‧Edge 6‧‧‧Tension 6a‧‧‧Metal cord 6A‧‧‧First Tensile Body 6B‧‧‧Secondary Tensile Body 7‧‧‧Protrusion 8‧‧‧Hole 9‧‧‧Protrusion 10‧‧‧First core material 10e, 11e‧‧‧ one end The other end of 10i, 11i‧‧‧ 10x, 11x‧‧‧Outer edge 11‧‧‧Second core material 13‧‧‧Core base 14‧‧‧Blade 14A‧‧‧First blade 14B‧‧‧Second blade 15‧‧‧Corner 17‧‧‧Outer top surface 17a‧‧‧First outer top surface 17b‧‧‧Second outer top surface 18‧‧‧Inner top surface 18a‧‧‧First inner top surface 18b‧‧‧Second inner top surface 20‧‧‧First pattern block 21‧‧‧Second pattern block 22A‧‧‧Width direction surface 22B‧‧‧Slope 25‧‧‧First inclined edge 25i‧‧‧Inner end 26‧‧‧First width direction edge 27‧‧‧Second inclined edge 28‧‧‧Second width direction edge a‧‧‧Circumferential direction of track b‧‧‧Crawler width direction c‧‧‧Track thickness direction co‧‧‧Outer circumference side of track ci‧‧‧Inner circumference side of track L1, L2‧‧‧distance L, w‧‧‧ length W‧‧‧Width

FIG. 1 is a plan view showing an elastic crawler belt according to an embodiment of the present invention as viewed from the outer peripheral side of the crawler belt. FIG. 2 is a cross-sectional view of the elastic crawler of FIG. 1 in the crawler width direction. 3 is a plan view of the elastic crawler when viewed from the outer peripheral side of the crawler. 4 is a plan view of the elastic crawler when viewed from the outer peripheral side of the crawler. Fig.5 (a) is the figure which looked at the 1st core material from the crawler belt circumferential direction, and FIG.5(b) is the figure which looked at the 2nd core material from the crawler belt circumferential direction a.

1‧‧‧Elastic Track

2‧‧‧Crawler body

2c‧‧‧Center

2x‧‧‧First edge

2y‧‧‧Second Edge

2o‧‧‧Outer peripheral surface of track body

3‧‧‧Core material

4‧‧‧Pattern block

10‧‧‧First core material

10e, 11e‧‧‧ one end

The other end of 10i, 11i‧‧‧

11‧‧‧Second core material

a‧‧‧Circumferential direction of track

b‧‧‧Crawler width direction

c‧‧‧Track thickness direction

L‧‧‧Length

W‧‧‧Width

Claims (8)

An elastic crawler, comprising: an annular belt-shaped crawler body including an elastic body; a core material, which is embedded in the crawler body at intervals in the circumferential direction of the crawler, and includes a material harder than the elastic body; and blocks , protruding from the outer peripheral surface of the crawler body towards the thickness direction of the crawler, and the crawler body has a first edge and a second edge in the width direction of the crawler, the core material comprises: a first core material, in the first The edge side has one end; and the second core material is adjacent to the first core material in the crawler belt circumferential direction and has one end closer to the first edge side than the one end of the first core material, the The blocks include a first block that overlaps across the one end of the first core material and the one end of the second core material when the crawler body is viewed in plan view, the The first block includes an inclined edge in which the outer edge of the block is inclined with respect to the track width direction from the one end side of the first core material toward the one end side of the second core material made. The elastic crawler according to claim 1, wherein in the core material, the first core material and the second core material are alternately arranged in the crawler belt circumferential direction. The elastic crawler belt according to claim 1 or 2, wherein the second core material has the other end on the second edge side, and the first core material has a side located more than the second core material the other end of which is closer to the other end of the second edge side, The block includes a second block, and the second block extends across the other end of the first core material and the other end of the second core material in a plan view of the crawler body. Overlapping, the second block includes an inclined edge in which the outer edge of the block goes from the other end side of the second core material to the other end side of the first core material It is inclined with respect to the width direction of the track. The elastic crawler belt according to claim 3, wherein the first block and the second block are arranged in a zigzag shape in the crawler belt circumferential direction. The elastic crawler belt according to claim 1 or 2, wherein the block includes: a widthwise portion extending along the widthwise direction of the crawler; and an inclined portion corresponding to the widthwise portion of the crawler in the widthwise direction of the crawler The outer ends are connected and inclined toward one side relative to the width direction of the track. The elastic crawler belt according to claim 1 or 2, wherein the crawler belt body has a hole portion penetrating in the crawler belt thickness direction at the center of the crawler belt body in the crawler belt width direction, and the core material has The first core material and the second core material have blade portions, and the blade portions are provided on both outer sides in the width direction of the crawler belt than the hole portion, and the blocks are arranged in a plan view of the crawler belt body. It overlaps with all the blade portions of the first core material and the blade portions of the second core material. The elastic crawler belt according to claim 6, wherein the blocks are connected to the holes. The elastic crawler belt according to claim 6, further comprising: a tensile body embedded on the outer peripheral side of the crawler belt rather than the core material and imparting a tensile force to the crawler belt body, and the blade portion includes: a first A blade portion is arranged on either side in the width direction of the crawler; and a second blade portion is arranged on the opposite side of the first blade portion in the width direction of the crawler, and the second blade portion is on the side of the crawler. The length in the width direction is longer than the first blade portion, and the first blade portion is arranged to face the tensile body and is arranged so as to not substantially receive the tensile force from the tensile body. There is a first distance ( L1 ) in the thickness direction of the crawler between the tension bodies, and the second blade portion is arranged opposite to the tension body and is arranged between the tension body and the tension body so as to receive the tension force from the tension body. There is a second distance (L2) in the thickness direction of the crawler, and the first distance (L1) is greater than the second distance (L2).

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